specs on the vg if you need them. http://en.wikipedia.org/wiki/Nissan_VG_engine
I would do it, I loved the VG30E in my old S12 I beat the shit out of that thing for 2 years and it had 230,000 miles on it, it never gave a shit. The thing that did that car in was electrical problems. The engine was still kicking hard. Loads of torque and pretty decent revablity
the DOHC engine is a wast of time IMHO because it ads so much more weight and complexity when you can make just as much power with the VG30E and have more room in the engine bay to work on it.
Any vg motor is great if you ask me but didn't the de and dett come with vvl heads?
NO, VVL stand for Variable Valve Lift which is found in FWD SR20 NEO engines. The VG30DE and VG30DETT use VCT Variable Cam Timing on the intake cam only, similar systems are on RWD s14 and s15 SR20, and RB 25 and 26 engines.